cpanel index page in blank

i have WHM 10.6.0 cPanel 10.8.0-C74 FreeBSD 5.4-RELEASE i386 - WHM X in my dedicated server, when mi customers try to open his cpanel nothing happend leave in blank, i have a couple of weks with this problem, some body can help me?

Everything appears to be working except cpanel. In /usr/local/cpanel/log/error_log, this is what is displayed when a theme's index.html or any file in ./base/frontend is displayed:
Child [4668]: exited with signal 13
.
I don't see the cpanel service crashing or any other for that matter... Please help us so we don't have to deal with another syswipe just to fix this.www.lunarshells.com
Support Team

Alright, well this sucks. No one in the forum can help and cpanel support is VERY slow on replying. Datacenter admins have filed numerous helpesk tickets with this problem and I can see that they arn't the only ones with this problem.

This second guesses on wether I want to use cpanel or not. What's gonna happen if we get into other cpanel bugs and we don't get any kind of support.